I am using the wave texture and am faced with a dilemma: by default, it is rotated in some obscure way. I want the bands of the texture to be aligned with each axis (x, y z) but cannot for the life of me figure out the rotation values required to do so. Any help?
It is probably just easier to recreate it using math nodes rather than trying to align it to axis.
Use a Math Node set to Cosine; as input use your desired texture coordinates like Object or Generated.
Add a Separate XYZ node and use the desired axis as direction, then multiply it by any value to control density of the waves.
You can still run the output through a color ramp node to control progression and color, and covert the whole thing into a node group for simplicity sake, to make it visually cleaner, easier to reuse or port to other files.